Rapidly approaching is a milestone birthday for myself. As a way to celebrate this a friend and myself are planning to brew a Schwartzbier. I see a few recipes in the DB but wondered does anyone tried these or know of clone recipe that is pretty close to a Kostritzer ( All Grain ) ? Any help would be great.

Happy upcoming B-day. I see from the contents page on the Szamatulski's "Beer Captured" book that they have a schwartzbier recipe. I don't own that book, but maybe you can get yourself an early birthday present?

You can probably get pretty close just from the style guideline...

Commercial Examples: Kostritzer Schwarzbier, Kulmbacher Monchschof Kloster Schwarzbier
A lager that uses judicious amounts of roasted malts for color and dryness, but not enough to impart a burnt flavor. Moderate bitterness from hops and roasted malt with a distinctive dry bitter-chocolate palate. Medium body with a malty aroma and low sweetness in aroma and flavor. Dark brown to black in color.

I don't know about how it would compare to the Kostritzer, but I have a clone recipe for Dixie Blackened Voodoo Lager. It is super tasty. When I am able to properly brew a lager beer, I will be making that one.